Excavating implement



Jan. 30, 1934. P. MURTAUGH EXCAVATING IMPLEMENT Filed Dec. 26, 1931 3Sheets-Sheet l 3 Shets- $heet 2 II I I I [I I ll J. P. MURTAUGHEXCAVATING IMPLEMENT Filed Dec 26, 1931 Jan. 30, 1934.

J Z 5 z 7 5 z 1934- J. P. MURTAUGH I EXCAVATING IMPLEMENT Filed Dec. 26,1931 I 3 Sheets-Sheet 3 Patented Jan. 30, 1934 PATENT OFFICE 1,945,664ExoAvA'rmG IMPLEMENT Joseph, P. Murtaugh, signor to American ChicagoHeights,

Chicago Heights, 111., as- Manganese Steel Company, 111., 'a corporationof Maine Application December 26, 1931 Serial No. 583,317

20 Claims. (01. 37-141) The present invention relates in general toexcavating implements and has particular reference to power actuateddippers, buckets or the like for use in excavating and otherwisehandling large quantities of earth and debris.

Briefly, the salient features of the invention reside in providing animplement of this style comprising a body portion preferably formed of aone piece casting with a separatelip member mounted thereon forconvenient removal, thus making it possible for the user to adapt theimplement, by interchange of lips, todifferent excavating requirements.

While the foregoing statement is indicative in a general way of thenature of the invention, other objects and advantages will be apparentupon a full understanding of the construction and cooperativerelationship of the several parts of the implement.

One type of construction for reducing the invention to practice ispresented herein byway of exemplification but it is to be understoodthat the invention is susceptible of embodiment in still otherstructural modified forms without departing from the spirit of theinvention as defined by the sub'joined claims.

In the accompanying drawings Figure 1 is a view in side elevation of adipper illustrating the application of the invention.

Figure 2 is a top plan view of the same. Figure 3 is a view in frontelevation of a portion of the dipper.

Figure 4 is a rear elevation of a portion of the V dipper.

Figure 5 is a section on the line 5-5, Figure 1. Figure 6 is a sectionon the line 6-6, Figure 1. Figure '7 is a section on the line 7-7,Figure 1. Figure 8 is a detail section of a separable lip member for adipper, together with an associated dipper tooth in which the diggingangle is modified from the construction shown in Figure 1; Figure 9 is aside elevation of Figure 8. Figure 10 is a front elevation of Figure 8.Figure 11 is a detail section of a further modification of the separabledipper lip in which the teeth are integrally formed therewith. I

Figure 12 is a side elevation of Figure 11. Referring now to thedrawings in detail, 5 represents the dipper which according to onefeature of the invention is constructed of a one-piece casting havingintegral front and back portions contributing to side, back and frontwalls. The back portion carries the customarybe'arings 6 for the hingesof a door (not shown); also the stick bearings 9 and the usualconnecting ears 10.

The back and upper part of the side walls of the dipper aredoubledwalled to add strength and rigidity to these parts. aswell as tofacilitate the heat treatment thereof walls are made with reinforcingribs 13.

The front portion carries the lip member 11 upon which are mounted theseveral teeth 17. As previously stated, aside from the one-piece cast-.ing for the dipper body, the separate and interchangeable lip member isanother and equally important feature of the invention. This 'separatelip member is shown to advantage as at 11, the same preferablycomprising a one-piece casting formed to accommodate it to the shape ofthe dipperso as to extend across the front thereof and approximatelyhalf way along the sides.

The lip member includes dipper tooth seats 15 and shoulders lfi adjacentthe seats 15 which are abutted by the dipper teeth 17. Tongues 16-project from the lip 11 and fit into sockets 18 of the dipper. casting.The tongues 16 are formed with tapered openings 19 made to register withtapered openings 20 in the side walls of the sockets 18 for thereception of tapered or wedgeshaped keys 21, thus contributing to adetachable mounting for the lip member. The openings 19 are slightlyover-size so that when the keys 21 are driven in the tapers thereof willdraw the tongues into the sockets causing the shoulders 22 on the teethmounting ribs 16 to impinge against the corners at the open ends of thesockets and bear upon the same for support. A locating rib.23 isprovided on the lip member which seats in a channeled groove along theedge of the dipper body.

In addition to the above described mounting for the lip member is thedetachable securing means at opposite sides of the dipper body. In thisconnection the opposed sides of the lip member are each preferablyformed with a double walled advanced portion 24 which terminatesrearwardly in a modified wedge-shaped tenon 25 made to fit within theopen side mounting member 26 cast as an integral upper part of each sidewall. On the inside of the wedge shaped tenon 25-is a boss or lug 27which is embraced by the U-bolt 28. The parallel legs of the bolt 28extend rearwardly through the hollow formed by the double wall of themounting member 26 and project beyond the same for the reception of nutsand nut locks 29.

The lugs 27 on the ends of the detachable lip enter into pockets formedby the double wall construction of the dipper side walls as shown inBoth the front and back Fig. 5. The lugs 27, by cooperating with thepockets, constitute means to prevent deflection 0f the ends of the lipin lateral directions with respect to the side walls of the dipper.Therefore, the ends of the lip are held against spreading outwardly aswell as against movement in an inward direction with respect to thedipper body caused by the digging strains upon the lip.

In securing the lip member in place, the U- bolts are first slipped overthe lugs or bosses 27 so that as the lip member is located the boltswill be inserted between the double walls of the mounting member 26 topresent their threaded ends in position for the reception of the nuts.When thus locating the lip member the tongues 16 will move into place intheir respective sockets. When the lip member has been properly seatedthe nuts 29 may be turned to wedge the tenon 25 within the confine ofthe mounting member 26, then the keys 21 may be driven through theregistering openings in the tongues and sockets. The ends of the keysmay be split so that after they are driven in place they may be spreadand thus prevented from working loose.

From the above it will be seen that the lip member and the teeth that itcarries may be easily applied and removed without sacrificing rigidity.or other qualities essential as a practical solution of the problemsinvolved.

To further accommodate the lip member and add to the support of thesame, the upper edge of the dipper body is flanged as at 31 to provide aslight overhang upon which the lip member bears. This flange extendsacross the front and along the sides for the entire length of the lipmember.

The detail construction of the teeth and the particular manner ofmounting them upon the lip member is of no special concern, in thepresent case. The teeth and their mounting on the lip maybe conventionalpractice or of special construction if and when desired.

The interchangeable lip member shown in Figure 1 is particularlyapplicable -for excavating rock, while the lip member Figures 11 and 12may be used for grading purposes.

A particular advantage of forming the side walls of the dipper with adouble wall section resides in the fact that the U-shaped bolts arereceived between the double walls of each of the dipper side walls andare therefore protected from wear. The double wall sections of the sidewalls extend upwardly with respect to the dipper beyond the upper edgeof the dipper front wall which constitutes a seat for the centralportion of the trough shaped digging lip, and the wedge shaped pocketsformed in the side walls engage the ends of the lip at a distance fromthe seat of the central portion of the lip upon the front wall. Thisarrangement provides leverage to securely hold the digging lip againstrotation with respect to its seat upon the front wall caused by diggingstrains.

Briefly expressing the outstanding feature of the invention from theusers viewpoint it provides a power actuated dipper, or excavatingimplement constituting a body and a plurality of tooth-equippedaccessories which are adapted for selective interchangeable applicationto the body, thus making one body serve several different purposes.

It will be understood that the detachable lip as described herein may bereadily installed upon a dipper in the field even though there may havebeen some distortion of the dipper bucket through its use. It is onlynecessary to drop the bucket upon the lip in such a manner that the lugs2'7 enter the pockets formed in the dipper side walls and the lip maythen be forced into place by the power of the shovel. The lug-s 6 and1'7 have a free fit in the pockets 18 formed in the upper edge of thefront wall. The keys 21 are then inserted to draw the central portion ofthe lip towards the bottom of the bucket and to bring the lip and theupper edge of the front into an abutment. The U-bolts 28 are accessiblefrom the back of the bucket to draw the ends of the lip towards the backof the bucket and this will serve to tightly seat the wedge portions 25on the ends of the lip in the wedge shaped sockets in the side walls ofthe bucket. The construction not only provides for replacement of thelip in the field without the use of rivets and within a very shortperiod of time, but also enables a material reduction in weight of thebucket; It will be noted that the only overlap is between the lug-s 27and the side walls of the bucket, whereas in prior constructions inwhich the lip has been riveted, it is necessary to provide aconsiderable overlap and added weight.

I claim:

1. In a dipper construction, a dipper body including a dipper front anda dipper back, a substantially U-shaped replaceable digging lip adaptedto be secured to said dipper front and means including members extendingthrough and accessible from the back of said dipper for engaging theends of said lip to secure said lip to said front.

2. In a dipper construction, a,- dipper body including a dipper frontand a dipper back, a replaceable digging lip adapted to be secured tosaid digging front, said lip including side portions and threaded meansengaging said side portions extending through and accessible from theback of said dipper for attaching or detaching the lip from said front.

3. In an excavating bucket construction. a bucket body, a substantiallyU -shaped replaceable digging lip adapted to be secured to said body,the ends of said lip and said body including wedge-shaped cooperatingportionsand means for holding said lip to said body and drawing saidportions into wedging engagement in directions within the planes of theends of said lip.

4. In a dipper construction, a dipper body including a dipper front anddipper side walls, a replaceable digging lip adapted to be secured tosaid front, said lip including side portions, the side portions of saidlip and the side walls of said dipper having wedge-shaped engagingportions and threaded means for drawing the side portions of said lipinto wedging engagement with the side walls of said dipper.

5. In a dipper construction, a dipper body having a dipper front anddipper side walls, a replaceable digging lip adapted to be secured tosaid dipper front, securing means for drawing said lip towards thebottom of said dipper body into abutting engagement with said dipperfront and additional securing means for drawing the side portions ofsaid lip into'abutting relation with the side walls of said dipper in adirection transverse to the abutment of said lip upon said front. I

6. In a dipper construction, a dipper body having a front wall, a backwall and side walls, a replaceable digging lip adapted to be secured tosaid dipper body, said lip forming an extension of said dipper frontwall and having side portions extending towards said dipper back walland means for fastening said lip to said body including means fordrawing the side portions of said lip toward said back wall.

7. In a dipper construction, a dipper body having a front wall, a backwall and side walls, a replaceable digging lip adapted to be secured tosaid dipper body, said lip forming an extension of said dipper frontwall and having side portions extending towards said dipper back walland means for fastening said lip to said body including means fordrawing the sideportions of said lip toward said back wall, said meanscomprising U-shaped bolting means engaging the side portions of said lipand extending through said back wall. a

8. In a dipper construction, a dipper body having a front wall, a backwall and side walls, a replaceable digging lip adapted to be secured tosaid dipper body, said lip forming an extension of said front wall andincluding side portions extending toward said back wall, the dipper sidewalls having a double wall formation between the side portions of saidlip and said back wall and means engaging said side portions of said lipand extending through said double wall formation towards the back wallfor fastening said lip to said dipper body.

9. In a dipper construction, a dipper body having a front wall, a backwall and side walls, a U- shaped replaceable digging lip adapted to besecured to said dipper body and means for fastening the central portionof said lip to said dipper front wall, sockets formed on said dipperside wall adapted to receive the ends of said U-shaped lip and meansengaging the ends of said lip and protruding through the back wall ofsaid dipper for drawing the ends of said lip into seating engagementwith the sockets.

10. A front construction of a dipper comprising a,trough-shaped bodysection, a separate upper trough-shaped section, and means forpreventing deflection of end portions of said upper section comprisinggrooves in one of said, sections into which portions of the other ofsaid sections extend, said grooves opening in the direction of theplanes of the side walls of said body section.

11. A front construction of a dipper comprising a trough-shaped bodysection including a front wall and side walls, said side walls havingportions extending upwardly beyond the upper edge of the front wall, aseparate upper trough-shaped lip section adapted to be secured tosaidbodysection and connections between the ends of said lip section andthe upwardly extending side portions of said body section for preventingdeflection of the end portions of said hi) section, said meanscomprising lugs on one of said sections and pockets in the other ofsaidsections into which said lugs extend, said pockets opening in thedirection of the planes of the side walls of said body section.

- 12. A front construction of a dipper comprising a trough-shaped bodysection including a front wall and side walls, said side walls havingportions extending upwardly beyond the upper edge of said front wall andspaced materially from the front wall, a separate upper trough-shapedlip section, the central portion of said lip section being adapted toseat upon the front wall of said body section and the end portions ofsaid lip section extending towards and engaging the upwardly extendingside portions of said body section and means for preventing deflectionof the end portions of said lip section, comprising lugs upon the endportions of said lip section substantially in the planes thereof andpockets in the side portions of said body section adapted to receivesaid lugs, said pockets opening in the direction of the planes of theside walls of said body section.

'13. In a dipper construction, a dipper body including front, back andside walls, said side walls having portions extending upwardly beyondthe upper edge of said front wall, a replaceable digging lip adapted tobe secured to said dipper body, said lip being substantially U-shaped toconform to the shape of the front and side walls of said dipper body andmeans for holding the-ends of said lip against lateral deflection withrespect to the side walls of said dipper body comprising coopera;inglugs and pockets on the end portions of said lip and the upwardlyextending side portions of said dipper body, said lugs and pocketsextending in the planes of the side walls of said dipper body to permitengagement between said lugs and pockets by assembly of the lip withrespect to the dipper body by movement towards the back wall of thedipper body.

14,. In a dipper construction, a dipper body including front, back andside walls, said side walls having portions extending upwardly beyondthe upper edge of said-front wall, a replaceable digging lip adapted tobe secured to said dipper body, said lip being substantially U-shaped toconform to the shape ,of the front and side walls of said dipper bodyand means for holding the ends of said lip against lateral deflectionwith respect to the side walls of said dipper body comprisingcooperating lugs and pockets on the end portions of said lip and theupwardly extending side portions of said dipper body, said lugs andpockets extending in the planes of the side walls of said dipper body topermit engagement between said lugs and pockets by assembly of the lipwith respect to the dipper body by movement towards the back wall of thedipper body and means for securing said lip to said body by drawing theend portions of saidlip towards the back wall of said dipper body tocause said lugs to enter said pockets.

15. In a dipper construction, a dipper body including front, back andside walls, a replaceable digging lip adapted to be secured to saiddipper body, said lip being trough-shaped to conform to the shape ofsaid dipper body and means for engaging the ends of said lip and saiddipper body for drawing the ends of said lip towards the back wall ofsaid dipper body.

' 16. In an excavating bucket construction, a bucket body includingfront, back and side walls, a replaceable digging lip adapted to besecured to said bucket body, said lip being trough-shaped to conform tothe shape of said bucket body, the end portions of said lip and the sidewalls of said portions, and means for drawing said wedge- 13% shapedportions into tight engagement.

17. In a dipper construction, a dipper body including front, back andside walls, a replaceable digging lip adapted to be secured to saidbody, said lip including side portions extending towards the back wallof said dipper body, the side portions of said lip having wedge-shapedextensions, the side walls of said dipper .body having wedgeshapedsockets adapted to receive the wedgeshaped extensions of said lip andmeans for drawing said wedge-shaped extensions into tight engagementwith said sockets, said means being effective to displace said liptowards the back wall of said dipper body.

18. In a dipper construction, a dipper body in- 150 cluding back, frontand side walls, a replaceable digging lip adapted to be secured to saiddipper body, said lip being substantially U-shaped, means for drawingthe ends of said lip towards the back wall of said dipper body and meansfor drawing the central portion of said lip into seat ing engagementupon the front wall of said'dip-,

memes into abutment against said front wall, the side [walls of saidbucket being formed to receive and house the ends of said lip section toprevent spreading thereof.

20. In combination, an excavating bucket having a front wall, side wallsand a back wall and a substantially trough-shaped lip section, taperwedge means cooperating with the front wall of said bucket for drawingthe central portion of said lip section into abutment against said frontwall, the side walls of said bucket being formed to receive and housethe ends of said lip section to prevent spreading thereof.

JOSEPH P. MURTAUGH.

